Headline Numbers

As of the latest CDC data release on October 23, 2020 there are:

Where I live, in Somerville, MA, as of June 25, 2020 there are:

Where my grandparents live, in Collier County, FL, as of October 23, 2020 there are:

Consequently, in the United States, there are now:

Globally, as of the latest WHO data release on October 25, 2020, there are:

Overall Covid Cases In The USA

Regions are defined as follows: Northeast (CT, ME, MA, NH, RI, VT, NJ, NY, PA), Midwest (IN, IL, MI, OH, WI, IA, KS, MN, MO, NE, ND, SD), South (AL, AR, DC, DE, FL, GA, KY, LA, MD, MS, NC, OK, SC, TN, TX, VA, WV) and West (AZ, CO, ID, NM, MT, UT, NV, WY, AK, CA, HI, OR, WA). The red line denotes the date that Health and Human Services (HHS) took over the production of data from the Center for Disease Control (CDC) on July 20, 2020.1

US Cases Compared to World Cases

World Case Maps: Total Cases and Cases per Capita

Covid Cases in Somerville, MA and MA

Latest Cases in Boston Area (Today, One Week Ago, Two Weeks Ago)

Date County Name Cases Deaths New Cases New Deaths
October 23, 2020 Middlesex County 33088 2243 175 3
October 16, 2020 Middlesex County 31985 2214 141 9
October 09, 2020 Middlesex County 31053 2182 158 4
October 23, 2020 Norfolk County 12849 1099 61 2
October 16, 2020 Norfolk County 12502 1087 42 1
October 09, 2020 Norfolk County 12191 1078 73 1
October 23, 2020 Suffolk County 28268 1168 226 2
October 16, 2020 Suffolk County 27246 1155 148 2
October 09, 2020 Suffolk County 26468 1144 109 1

New Covid Cases By State

The plot below shows the number of new COVID cases by state. Note that each figure has its own y axis; this is done so that trends can be seen within each state. Log scales can make the difference between 100 and 1000 cases hard to discern and a common y axis causes states like NY and CA to swamp states like NC. Negative new cases can occur when States revise their total number of cases downwards, as Hawaii did between June 30, 2020 and July 1, 2020.

COVID Cases per 1,000 Residents by State

This figure shows the number of COVID cases per 1,000.

Latest County Case Map

Latest County Death Map

Counties with the Most Cases Over Time

Date State County Name Cases Deaths
2020-10-23 CA Los Angeles County 296821 6974
2020-10-23 FL Miami-Dade County 181017 3597
2020-10-23 IL Cook County 171437 5392
2020-10-23 TX Harris County 156742 2765
2020-10-23 AZ Maricopa County 152695 3536
2020-10-01 CA Los Angeles County 271371 6610
2020-10-01 FL Miami-Dade County 170882 3284
2020-10-01 IL Cook County 146152 5229
2020-10-01 TX Harris County 142681 2607
2020-10-01 AZ Maricopa County 142287 3405
2020-09-01 CA Los Angeles County 242521 5829
2020-09-01 FL Miami-Dade County 159059 2537
2020-09-01 AZ Maricopa County 134004 2976
2020-09-01 IL Cook County 126992 5065
2020-09-01 TX Harris County 106595 2208
2020-08-01 CA Los Angeles County 190693 4669
2020-08-01 FL Miami-Dade County 121207 1647
2020-08-01 AZ Maricopa County 119295 2089
2020-08-01 IL Cook County 106131 4888
2020-08-01 TX Harris County 72964 1288

Hospitalizations By State

Patients Currently in the ICU

Patients Currently on Ventilators

Cumulative Cases by County in the Northeast

Cumulative Cases by State Over Time

Cumulative Deaths by State Over Time

Daily Percent Positive Cases

According to the WHO the positive rate should be below 5%.2 Days above the threshold are denoted in red, days below are in blue. Note that the variables currently used for these plots –positiveIncrease and negativeIncrease– are being phased out and will be replaced by positiveCasesViral and negativeCasesViral. Each dot represents the rolling average of tests within the previous week (this approach smoothes out trends such as fewer cases being reported on weekends).

Partisanship and COVID Cases

Variants of Select Figures

Week to Week Changes in COVID Cases

Confirmed Cases as a Percentage of State Population

The two sets of points are confirmed cases (black), and potential cases (grey) which are confirmed cases times ten. For herd immunity, typically 70-90% of a population needs immunity.3


  1. See e.g., https://www.cnbc.com/2020/07/20/hhs-unveils-new-coronavirus-hospitalization-database-says-its-more-complete-than-cdcs.html↩︎

  2. https://coronavirus.jhu.edu/testing/tracker/overview↩︎

  3. See https://www.jhsph.edu/covid-19/articles/achieving-herd-immunity-with-covid19.html↩︎